Dhammapada Verse 12.4

Sanskrit Verse

आत्मा हि आत्मनो नाथः कोहि नाथः परः स्यात् । आत्मना हि सुदान्तेन नाथं लभते दुर्लभम् ॥

Bhikkhu Ānandajoti's translation

One is truly one’s protector. Who else could the protector be? With oneself fully controlled one gains a protector which is hard to gain.